Hydraulic car jack



. Mar. 27, 1923.

H. REHAK HYDRAULIC CAR .mcx

Filed NOV. 10, 1922 y liquid passes to the Patented Mar. 27, 1923-. I

UNITED STATES PATENT OFFICE.

HANS REHAK, OF VIENNA, AUSTRIA,

HYDRAULIC CAR JACK.

' Application filed November 10, 1922. Serial No. 600,127.

To all whom it may concern: Fig. 2 shows the base of the jack in longi- Be it known that I, Hans REHAK, a cititudinal section, zen of the Austrian Republic, residing in Fig. 3 is an elevation partly in section Vienna," Austria, have invented certain new showlng the pumping arrangement, and and useful Improvements in Hydraulic Car Fig. 4 is a plan view of the pumping ar- Jacks, of which the following is a specificarangement.

tion. In the solid base 1 of the ,apparatus, a This invention relates to hydraulic car tube 2 is ti htl inserted, in which slides a jacks. piston 3. he atter conta'ns a displaceable 1 Hydraulic car jacks are already known in sleeve or liner 4 which can be adjusted to which the base receiving the lifting piston various heights in relation to the piston 3 is provided with a hollow carrying rod or by means of pins Which can be inserted in handle, directed upwards, and to the free the holes 5. end of which a water supply hose is at- The base 1 rests in front on two rollers 15 tached. and at the rear on a heel 7, thus securing a to This jack has not found ready adoption in firm stand for the jack. 4 practical working because, on the one hand, The handle 8, inclined upwards as shown, owing to the low pressure of the water sup-' is inserted in a hollow lug cast on to the ply 1t can only be used for lifting small foot 1 and has attached to it, near its free 20 loads, and only in premises fitted with water end, the receptacle 9 for the pressure medisupply pipes, while on the other hand the mm. The handle 8 is hollow and contains a water supply hose, and the discharge of thetube 10, which is connected, by a screw cap pressure medium direct into the open air, 11 or the like, to the channel 12 of base 1, will impede the mechanic in his operations, discharging beneath the piston .3, andserves 25 apart from the fact that both workmen and as a channel for the pressure medium. workshop will be moistened and soiled by The two pump pistons 13 and the disthe discharged water. charging arrangement 14 are arranged in .These evils are efi'ectively avoided in the the receptacle 9. 'From the two pump cylcar jack according to the present invention inders 15 the operating liquid is dehvered 30 by providing the carrying rod or handle, into an upright tube 15 from which a horinear its free end, with a liquid receptacle 'zontal bored extension 16 leads through the containing the pressure and discharge arwall of the receptacle 9 to the outside where rangement for the operating liquid, which it is provided with a screw-i read for joinlfting piston through ing it on to the supply pipe 10 by means of v35 a channel or duct arranged within the carrya swivel screw-cap 17. 4

in rod, or in some other suitable manner. Two pump pistons 13 are provided with he jack may be used equally well in and operated by the two-armed lever 18 workshops and on the road; it is exceeding which extends over the horizontal portion 8 1y simple to operate at any time, as the of the handle 8. In working the jack the 40 pumping arrangement is always combined rod 8' at the handle is held inone hand with the car jack and can be rapidly transwhile the lever 18 is moved up and down ported to any desired Spot. I with the other hand. The discharging ar- Drawin are appended illustrating one rangement 14 comprising a P11]. actm on form of t e invention in, which 2- the discharging valve 19 is actuated y a J Fig. 1 is an elevation, thumb piece 20.

ceptacle'secured to the'handle, said handle If desired the hollow handle 8 may itself be utilized as the channel for the operating liquid.

Claim: v

A hydraulic jack comprising a' base; a cylinder and cooperating piston in said base a handle secured to said base; a liquid .re-

comprising means to form a communication between the cylinder and said receptacle; a two cylinder pump in said. receptacle; a channel member secured to the base of each pump for leading the liquid to the handle a discharging arrangement in said receptacle and associated with said channel member; and means for operating said pump and said discharging arrangement. 1

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

' HANS REHAK. 1

Witnesses: CARL CoUnINHonY,

, RUDOLF Mnsmn. 

